Dye for material with amide functional groups and dyeing method of using the same

Abstract

A dye for a material with amide functional groups and a dyeing method of using the same are provided. The dye includes a compound represented by Formula (I) and a solvent. Based on the total weight of the dye of 100 wt %, a content of the compound represented by Formula (I) is 40 wt % to 95 wt %.In Chemical Formula (I), R1, R2 and R3 are each independently H, —OH or —COOH, wherein at least one of R1, R2 and R3 is —OH or —COOH.

What is claimed is: 
     
         1 . A dye for dyeing a material with amide functional groups, comprising:
 a compound represented by Formula (I); and   a solvent,   
       
         
           
           
               
               
           
         
         in the Formula (I), R 1 , R 2  and R 3  are each independently H, —OH, or —COOH, wherein at least one of R 1 , R 2  and R 3  is —OH or —COOH, and 
         based on a total weight of the dye of 100 wt %, a content of the compound represented by the Formula (I) is 40 wt % to 95 wt %. 
       
     
     
         2 . The dye according to  claim 1 , wherein the compound represented by the Formula (I) is obtained by chemosynthesis or biosynthesis. 
     
     
         3 . The dye according to  claim 1 , wherein the compound represented by the Formula (I) comprises 5,6-dihydroxyindole (DHI), 5,6-dihydroxyindole-2-carboxylic acid (DHICA), or a combination thereof. 
     
     
         4 . The dye according to  claim 1 , wherein the material with amide functional groups comprises nylon, an artificial leather, or a combination thereof. 
     
     
         5 . The dye according to  claim 1 , wherein the dye comprises 5,6-dihydroxyindole and 5,6-dihydroxyindole-2-carboxylic acid, and a weight ratio of 5,6-dihydroxyindole to 5,6-dihydroxyindole-2-carboxylic acid is 1:15 to 15:1. 
     
     
         6 . The dye according to  claim 1 , wherein a hue produced by the dye is black, brown, or a mixture of the two. 
     
     
         7 . The dye according to  claim 1 , wherein a pH value of the dye is 3.5 to 6.5. 
     
     
         8 . A dyeing method, comprising using a dye solution to contact a material with amide functional groups to perform a dyeing step, wherein the dye solution comprises a dye comprising a compound represented by Formula (I), 
       
         
           
           
               
               
           
         
         in the Formula (I), R 1 , R 2  and R 3  are each independently H, —OH, or —COOH, 
         wherein at least one of R 1 , R 2  and R 3  is —OH or —COOH, and 
         based on a total weight of the dye of 100 wt %, a content of the compound represented by the Formula (I) is 40 wt % to 95 wt %. 
       
     
     
         9 . The dyeing method according to  claim 8 , wherein the compound represented by the Formula (I) comprises 5,6-dihydroxyindole (DHI), 5,6-dihydroxyindole-2-carboxylic acid (DHICA), or a combination thereof. 
     
     
         10 . The dyeing method according to  claim 8 , wherein the material with amide functional groups comprises nylon, an artificial leather, or a combination thereof. 
     
     
         11 . The dyeing method according to  claim 8 , wherein a concentration of the dye in the dye solution is 1% on weight of the fabric (o.w.f.) to 25% on weight of the fabric. 
     
     
         12 . The dyeing method according to  claim 8 , wherein the dye comprises 5,6-dihydroxyindole and 5,6-dihydroxyindole-2-carboxylic acid, and a weight ratio of 5,6-dihydroxyindole to 5,6-dihydroxyindole-2-carboxylic acid is 1:15 to 15:1. 
     
     
         13 . The dyeing method according to  claim 8 , wherein a hue of the dyed material with amide functional groups is black, brown, or a mixture of the two. 
     
     
         14 . The dyeing method according to  claim 8 , wherein a reaction temperature of the dyeing step is performed at 80° C. to 130° C. 
     
     
         15 . The dyeing method according to  claim 8 , wherein a reaction pH value of the dyeing step is 3.5 to 6.5. 
     
     
         16 . The dyeing method according to  claim 8 , wherein a reaction time of the dyeing step is 30 minutes to 60 minutes. 
     
     
         17 . The dyeing method according to  claim 8 , wherein a test of color fastness to dry and wet crocking (AATCC 8) for the dyed material with amide functional groups is at a grade of 4 to 5. 
     
     
         18 . The dyeing method according to  claim 8 , wherein a test of color fastness to water(AATCC 107) for the dyed material with amide functional groups is at a grade of 4 to 5. 
     
     
         19 . The dyeing method according to  claim 8 , wherein a test of color fastness to washing (AATCC 61) for the dyed material with amide functional groups is at a grade of 4 to 5. 
     
     
         20 . The dyeing method according to  claim 8 , wherein the color strength (K/S) value of the dyed material with amide functional groups is 3 to 35.